ALY Allis-Chalmers Energy

Allis-Chalmers Energy Inc. (NYSE: ALY) today announced that it will release its third quarter results before the market opens on Thursday, November 4, 2010. In conjunction with the release, the Company has scheduled a conference call that will be broadcast live over the Internet on Thursday, November 4, 2010 at 10:00 a.m. Eastern (9:00 a.m. Central).

          What:       Allis-Chalmers Energy Third Quarter 2010 Earnings Conference Call   When: Thursday, November 4, 2010 at 10:00 a.m. Eastern (9:00 a.m. Central)   How to:

Live via Internet – http://www.alchenergy.com – Allis-Chalmers Energy Third Quarter 2010 Earnings Conference Call.

Live via phone – By dialing (888) 771-4350 domestically or (847) 585-4343 internationally ten minutes prior to the start time. The confirmation number is 28229267.

Participants may pre-register for the call at the following link and will be issued a new phone number and a PIN number to use when dialing into the live call which will provide quick access to the conference by bypassing the operator upon connection.

http://www.yourconferencecenter.com/r.aspx?p=1&a=UDjeyKuPPLMmYB

A telephonic replay will be available through November 11, 2010 and may be accessed by calling (888) 843-7419 (international calls (630) 652-3042) and using the passcode 7540224#. Also, a webcast archive will be available at http://www.alchenergy.com shortly after the call is complete. For more information, please contact Darla Blaha at Allis-Chalmers Energy Inc. at 713-369-0550 or email dblaha@alchenergy.com.

About Allis-Chalmers

Allis-Chalmers Energy Inc. is a Houston-based multi-faceted oilfield company. We provide services and equipment to oil and natural gas exploration and production companies, domestically primarily in Texas, Oklahoma, Louisiana, Arkansas, Pennsylvania, New Mexico, Colorado, offshore in the Gulf of Mexico, and internationally, primarily in Argentina, Mexico and Brazil. Allis-Chalmers provides rental services, international drilling, directional drilling, tubular services, underbalanced drilling, and productions services. For more information, visit our website at http://www.alchenergy.com or request future press releases via email at http://www.b2i.us/irpass.asp?BzID=1233&to=ea&s=0.